Police also seized multiple international passports from the four Yemeni suspects, along with 270,000 ringgit ($60,740; £50,000) in different currencies which they believe was meant to be channelled to the insurgent group.

Mr Abu Bakar told journalists the group "are also involved in distributing drugs".

The United Nations has said Yemen now faces the largest food insecurity emergency in the world, with an estimated 7.3 million people needing immediate help, while more than 10,000 people have been killed in the conflict.

King Salman was accompanied by a 600-strong delegation for his four-day visit in Malaysia.

It was the start of a month-long Asia tour, for which the monarch has packed 459 tonnes of equipment, including two Mercedes-Benz S600s and two electric lifts.